Corner guard



FIG. 1 is a front elevational view of a corner guard showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an end elevational view taken from the left of FIG. 1, the side opposite being a mirror image thereof;

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a corner guard, as shown and described. 